package org.example.shiro;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;

import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.apache.shiro.subject.Subject;
import org.example.model.User;
import org.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;

//自定义Realm处理登录权限
public class UserRealm extends AuthorizingRealm {

    @Autowired
    private UserService userService;
    //执行认证逻辑
    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken arg0) throws AuthenticationException {
        System.out.println("执行认证逻辑");
        //1、判断用户名 token中的用户信息是登录时候传进来的
        UsernamePasswordToken token = (UsernamePasswordToken) arg0;
        String username = token.getUsername();
        String password = "";
        if(token.getPassword() != null){
            password = new String(token.getPassword());
        }
        User user = userService.findByName(token.getUsername());
        System.out.println(user);

//        if(user == null){
//            //用户名不存在
//            return null;
//        }
        //2、判断密码
        SimpleAuthenticationInfo info = new SimpleAuthenticationInfo(user,password,getName());
        System.out.println(info);
        return info;

    }

    //执行授权逻辑
    @Override

    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection arg0){
        //doGetAuthorizationInfo方法可能会执行多次，权限判断次数多少，就会执行多少次
        System.out.println("执行授权逻辑1");
        System.out.println("执行授权逻辑2");
        SimpleAuthorizationInfo info = new SimpleAuthorizationInfo();
        //添加资源的授权字符串
        //info.addStringPeimission("user:add);
        //到数据库查询当前登录用户的授权字符串
        //获取当前登录用户
        Subject subject = SecurityUtils.getSubject();
        User user = (User)subject.getPrincipal();
        User dbUser = userService.findById(user.getId());
        info.addStringPermission("user:add");
//        info.addStringPermission();
        return info;
    }
}
